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Old Dec 6, 2010 | 01:56 PM
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Default 4l60e trouble

Well this is a lt1 Trans Am that belongs to my cousin, the problem started after running over a dog. I took it for a test drive and it drives like it has a stall. I was the owner of this car before him and to me it feels like it was a stock converter with 3.42 gears. The problem now is that it goes way up to 3k rpm before shifting into 2nd, since I just drove in the neighborhood I didn't want to go to fast, needles to say I couldnt get it out of 2nd at 40 mph. The fluid looks fine to me, another thing is that it idles high, it can idle at 2k rpm, turn it off and back on and its at like 1k, could this be related? Any suggestions as to what it could be? All help is appreciated.
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Old Dec 6, 2010 | 02:07 PM
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Do you think hitting the dog could have possibly jarred a vacuum line loose? That would be my first guess.
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Old Dec 6, 2010 | 02:18 PM
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Tps. .
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Old Dec 6, 2010 | 02:26 PM
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Originally Posted by Hemi2Slo
Do you think hitting the dog could have possibly jarred a vacuum line loose? That would be my first guess.
Thats what we thought but there is nothing under that looks out of place or cut up or anything like that

Originally Posted by Jays_SSZ28
Tps. .
Thats what it might come down to, we checked all the emmission lines on it and all look good.

Two more questions

Will unplugging the tps do anything to it, like bringing the idle back to normal or something, just to trouble shoot it?

Should a LT1 start with the maf unplugged, we tried it and it doesn't, I could've sworn I did that before.
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Old Dec 6, 2010 | 02:35 PM
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I'll admit that I don't know enough about the lt1 to answer about the MAF. But I would think that unplugging the tps could help you troubleshoot since if the tps is shot then nothing would change.
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Old Dec 6, 2010 | 02:37 PM
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I'm assuming there is no SES light on?
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Old Dec 6, 2010 | 03:18 PM
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Took it for another drive to auto zone to get it scanned, the codes that it gave us was tpa and maf, bought the tps first.

While I drove it over there I got on it, if I get past 3k in first it shifts perfect, when in second it pulls all the way up to 3200 to 3500 rpm and then slips all the way to 5k and wont shift, bad converter?
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Old Dec 6, 2010 | 06:42 PM
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Changed the tps and it shifts smooth now. The only problem now is that when it goes into third and it slips, revs to about 3500 rpm and it feels like slight pull but doesn't move anywhere. What could that be, bad tranny or fluid needs change?
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Old Dec 6, 2010 | 09:04 PM
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Dont waste your money on fuild change the slip is the clutches are burnt. It needs the Transmission rebuilt.
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Old Dec 6, 2010 | 10:16 PM
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Yep, clutches are shot to crap. The 3-4 clutch packs are one of the weak links in the 4l60. Time for a rebuild
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Old Dec 7, 2010 | 09:24 PM
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Damn, thats not good. Will have to tell my cousin about that.
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Old Dec 9, 2010 | 06:54 PM
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Yep toast!!!
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